Blue tongue coating is generally caused by the loss of food pigment staining, such as accompanied by other clinical symptoms, the need for timely medical diagnosis and treatment.
Tongue moss, refers to a layer of moss on the tongue, produced by the spleen and stomach qi vaporization of food turbidity in the stomach. Pathological changes in the color of the moss mainly white moss, yellow moss, gray and black moss three categories. White moss can be normal tongue moss, the disease is mostly the main surface evidence, cold evidence, wet evidence, can also be seen in the heat evidence. Yellow moss is the main heat evidence, internal evidence, gray and black moss is the main yin and cold, or internal heat blazing (the body heat evil serious), etc..
If you eat some blue-colored food, it may be due to food pigment loss staining and lead to blue tongue, such as blueberries, etc., which is a normal physiological phenomenon, generally do not need special treatment. If accompanied by other clinical symptoms, timely medical diagnosis and treatment is required.